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|If the MELTING POINT of hydrogen chloride (HCl) is -115°C and BOILING POINT is -85°C, what STATE is it in at room temperature?||Gas|
|DELOCALISED electrons within metals are ---(1)---, allowing them to carry a ---(2)---, which means that they conduct electricity.||1: free to move; 2: charge|
|ALLOYS are harder than pure metals because they contain atoms of DIFFERENT sizes. This ---(1)--- the layers, making it ---(2)--- for them to SLIDE over each other.||1: distorts; 2: harder|
|MAGNESIUM OXIDE has a higher MELTING POINT than SODIUM CHLORIDE because Mg²⁺ and O²⁻ ions form…||STRONGER IONIC bonds than Na⁺ and Cl⁻ ions since they are more STRONGLY CHARGED|
|Which STATE SYMBOL is used to denote a substance DISSOLVED IN WATER?||(aq)|
|The strong ---(1)--- forces between OPPOSITELY charged ions gives IONIC compounds ---(2)--- melting and boiling points.||1: electrostatic; 2: high|
|Ionic bonding normally occurs between ---(1)--- where the molecules ---(2)---.||1: a metal and a non-metal; 2: are oppositely charged|
|When a liquid is heated to its boiling point…||the particles near the surface have enough energy to ESCAPE by evaporation|
|Nitrogen gas, which makes up approximately 78% of the atmosphere, has the formula…||N2|
|[TRUE or FALSE?]: Metals are a GIANT structure of positive ions surrounded by electrons.||[TRUE]: They are CRYSTAL LATTICE structures with free 'delocalised' electrons|
|The 'sea' of NEGATIVELY charged delocalised electrons holds the METALLIC structure together because of…||their attraction with the POSITIVELY charged atomic lattice|
|Which of the following statements regarding the properties of METALS is TRUE?||They can conduct ELECTRICITY because their DELOCALISED ELECTRONS carry charge|
|If the MELTING POINT of sodium chloride (NaCl) is 1074°C and BOILING POINT is 1686°C, what STATE is it in at room temperature?||Solid|
|Which STATE SYMBOL is used to denote a SOLID?||(s)|
|Nanoparticles are within the ---(1)--- size range, which equates to ---(2)--- atoms.||1: 1 - 100 nm; 2: a few hundred|
|Titanium dioxide nanoparticles ---(1)--- light, so they CAN'T be seen, which makes them excellent to use as ---(2)---, as they ABSORB harmful UV rays and leave no visible residue.||1: DO NOT reflect; 2: sunscreen|
|Ionic Compounds are typically made up of...||Metal + a non-metal|
|NANAOPARTICLES have a ---(1)--- which ---(2)--- of their forces of attraction.||1: HIGH surface area to volume ratio; 2:INCREASES the strengh|
|DIAMON cannot ---(1)--- because it has no free electrons; they are all used to form covalent bonds with ---(2)--- other carbon atoms.||1: conduct electricity; 2: FOUR|
|Oxygen gas, which makes up approximately 21% of the atmosphere, has the formula...||02|